Abstract: The invention relates to high voltage suspension insulators of the single disc type and high voltage station post insulators consisting of unitary insulator sections. The insulator elements are designed so as to maximize the number of dry bands under adverse weather conditions thereby to maximize the total arc root resistance under arcing conditions so as to minimize the likelihood of flashover.

Abstract: The invention relates to ACSR conductors having two or more layers of conductor strands wound helically around a steel core, the layers being wound alternately in right-handed and left-handed helices. The AC/DC resistance ratio of such a conductor can be greatly reduced by appropriate selection of the lay factors of the strand layers in relation to the cross sectional areas of the respective layers. The unbalanced mechanical torque can also be greatly reduced by appropriate selection of the lay factors of the strand layers in relation to the means diameters of the layers and the outside diameter of the conductor.

Abstract: Cold drawn carbon steel wire, more particularly stranded galvanized wire for use in overhead power transmission lines, is heat treated in the untensioned state for a period of at least one hour at a temperature in the range 150.degree. C.-200.degree. C. The preferred temperature is about 175.degree. C. The treated wire has a reduced susceptibility to permanent elongation under tensile stress. ACSR conductors incorporating such wire as the steel reinforcement have a greatly reduced sag under heavy ice loading.

Abstract: A pendulum type vibration absorber tester/adjuster, which enables vibration absorbers to be set to a desired damping in the factory. The test/adjustment is effected by mathematically determining the pendulum weight and arm length, setting the pendulum into motion and recording the motion on a chart recorder, and adjusting the damping of the absorber until a predetermined decrement is obtained.

Abstract: A vibration absorber for attachment to a single conductor suspended transmission line to suppress vertical aeolian vibrations. A clamp arm has one end attached to a suspended cable and another end rotatably coupled to a housing having a weight extending therefrom through two frictionally-engaged elements which provide coulomb friction when the clamp arm is caused to rotate relative to the housing as a result of said vibrations. A separate resilient member couples the clamp arm to the housing to restore the initial orientation of the clamp arm.

Abstract: A vibration absorber for attachment to suspended cables such as electrical transmission lines, to suppress vertical aeolian vibrations as well as horizontal subconductor oscillations. A clamp arm has one end attached to a suspended cable and another end rotatably coupled to a frame through two frictionally-engaged elements which provide coulomb friction when the clamp arm is caused to rotate relative to the frame as a result of said vibrations or oscillations. A separate resilient member couples the clamp arm to the frame to restore the initial orientation of the clamp arm.

Abstract: A vibration absorber for attachment to suspended cables such as electrical transmission lines, to suppress vertical aeolian vibrations as well as horizontal sub-conductor oscillations. A clamp arm has one end attached to a suspended cable and a fulcrum adjacent the other end. The fulcrum is rotatably coupled to a frame, and the end of the clamp arm adjacent the fulcrum is coupled to the frame through the air cylinder damping element which forces air through a small orifice to provide viscous damping when the clamp arm is caused to rotate relative to the frame as a result of said vibrations or oscillations. A pair of torsion springs or non-rotatably mounted resilient washers acts to restore the initial orientation of the clamp arm.

Abstract: A vibration absorber for attachment to suspended cables such as electrical transmission lines, to suppress vertical aeolian vibrations as well as horizontal subconductor oscillations. A clamp arm has one end attached to a suspended cable and a fulcrum adjacent the other end. The fulcrum is rotatably coupled to a frame, and the end of the clamp arm adjacent the fulcrum is coupled to the frame through two bellows elements which force air through small orifices to provide viscous friction when the clamp arm is caused to rotate relative to the frame as a result of said vibrations or oscillations. Each bellows includes a resilient pleated portion which acts to restore the initial orientation of the clamp arm.

Abstract: In a vibration absorber for use with aerially suspended conductors and cables, there is described an improved vibration absorber wherein wind or turbulence induced vibrations resulting in travelling waves on conductors and cables are absorbed so as to prevent damage to or failure of conductors and related hardware due to fatigue. Known devices, particularly dampers and spacer dampers, attempt to control merely the amplitude of the waves produced on the conductor and are therefore ineffective in preventing the formation of such waves and the damage that may result. In this invention, a vibration absorber comprises a piston and cylinder device whereby a travelling wave displaces the piston or the cylinder relative to one another causing a fluid contained within the cylinder to be displaced through an orifice in the piston. The absorbing system thus defined has a mechanical dissipative impedance of value R to inhibit the reflection of a wave propagated on the conductor whereby the wave is absorbed.

Abstract: A conductor support member includes an external surface having a first portion thereon. The first portion is shaped to generate a localized increase in voltage gradient. Shielding means including surfaces intersecting to define a sharp edge are provided to promote a negative corona discharge adjacent the first portion. The said negative corona discharge produces a positive space charge to reduce the voltage gradient at the first portion. This inhibits the generation of positive corona discharge.

Abstract: A cement for mechanically and electrically joining metal hardware to an insulator shell having a semiconducting surface is made conductive by having graphite fibres and carbon black particles admixed therein.